Depends on how much brain power will flow into this, and how open this will be.

There was an article today that a bunch of top brains from Intel jumped ship and are going to work on RISC-V, and the Chinese government has an interest to further an architecture independent of X86 and ARM.

But those works will take a few years before they can be considered alternatives to ARM or even X86, even if they throw in loads of man-years.